Revolving set about to cause problems (3,2)
I believe the answer is:
act up
'to cause problems' is the definition.
I can't judge whether this defines the answer.
'revolving set about' is the wordplay.
'revolving' says the letters should be written backwards.
'set' becomes 'put' (synonyms).
'about' becomes 'ca' (circa).
'put'+'ca'='putca'
'putca' backwards is 'ACT UP'.
Can you help me to learn more?
(Other definitions for act up that I've seen before include "Misbehave - carry on" , "Mess about" , "malfunction" , "create fireworks display?" , "Become unpleasant" .)